refactor(user): 更新收藏歌手页面的取消收藏功能

- 将 toggleCollectSinger API 调用替换为 uncollectSinger API
- 优化了取消收藏歌手的逻辑，提高了代码的可读性和维护性

music-qianduan/src/views/user/CollectSinger.vue

@@ -2,7 +2,7 @@
 import { ref, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { getCollectedSinger, toggleCollectSinger } from '../../api/singer'
+import { getCollectedSinger, uncollectSinger } from '../../api/singer'
 import { processImageUrl } from '../../utils/imageUtils'
 
 const router = useRouter()
@@ -59,7 +59,7 @@ const cancelCollect = (id, event) => {
     type: 'warning'
   }).then(async () => {
     try {
-      const res = await toggleCollectSinger(id)
+      const res = await uncollectSinger(id)
       if (res.code === 200) {
         // 从列表中移除该歌手
         collectSingers.value = collectSingers.value.filter(item => item.id !== id)